Check-valve.



W` F. ROPER.

CHECK VALVE.

APPLICATION FILED IAN.I3,I9I1.

l 30C 5 3 PiIIeIIte-d Apr. 15, N19.

im@ 51%/ by' WALTER. r. norma' or Hermann, MASSACHUSETTS, nssrenon rroHorsham MANUrAcTUaINe COMPANY, or irrnronn, MASSACHUSETTS.

Specification of Letters Patent.

UHECK-VALVE.

Patented Apr. 15,1919.

appiicationaiea January 13,1917. serial no. 142,284.

To all whom t may concern Be it known that I, WALTER F. RorER, a citizenof the United States, residing at Hopedale, in the ycounty of Worcesterand State of Massachusetts, have invented an' Improvement inCheck-Valves, of which the following description, in connection with theaccompanying drawings, is a specification, y like` characters on thedrawings representing like parts. l

The invention to be hereinafter described relates to check valves forpumps, Huid cir--l culation systems and the like, and among otherobjects vaims to provide a simple, compact check valve constructionwhich will be protected so that foreign matters cannot reach thevalve-and its seat and prevent effective closing of the valve.

The character of the invention will be best understood by reference tothe following description of one embodiment thereof shown in theaccompanying drawings, Wherein:

Figure 1 is a construction 4 ig. 2 is aside elevation thereof; p Fig. 3is -a vertical section taken on line 33 of Fig. Er; and l Fig. 4L is aview showing the top plate, screen and bottom plate separated to Showthe form thereof more clearly.

Referring `to the drawing: the device shown therein as agood example ofthe 'invention comprises a top plate l and a bottom plate 3, preferablyof general elliptic or elongated form. A cylindrical valve chamber 5projects from and in the present instance of' the invention is integral'with the top plate. The lower end of this chamber has a port therein,the margin of which may serve as a seat 7 (Fig. 3) for receiving a ballor other suitable valve 9.

This ball is substantially smallerin diameter than the inner diameter ofthe chamber 5, thereby permitting said valve to move plan view of thecheck valve readily to and from its seat according to piping.

To protect the valve and prevent ingress of foreign matters thereto, isuch as might prevent proper seating of the valve, a foraminous wall orscreen 17 may be provided. In the present instance, it is of generalelliptic shape to conform to the contour of the opposed plates l and 3.The upper end of the screen may be formed to present a flange 19. ThisHangs and the opposite edge of the screenv are positioned by and seatedin grooves 21 and 23 in the margins of the opposed plates l and Theseplates should be drawn toward one another to press the edges of saidscreen securely into said grooves. To accomplish this through screws 25may be entered sent the screen between the upper and lower plates andtighten the through screws. Also, the parts may be separated with equalfacility fdr purposes of cleaning and repair.

The partsi are few in number,simple, strong, and cheap to manufacture.

` lt will be noted that the valve and its seat are locatedcloselyadjacent to the bottom plate and consequently the valve may bereadily located substantially at the lowest point in a system wherethere will be the greatest head above the valve and .consequently thegreatest pressure upon the same which will desirably act to hold ittightly closed on its seat.

It will be understood that the invention is not limited to the specificembodiment shown herein, but that various ,departures may be madetherefrom without departing from the spirit andlscope of the appendedclaims.

What is claimed is l. A check. valve comprisintgin combination, upperand lower plates, the former having a chamber depending therefrom andpresenting` an opening inthe bottom` thereof closely adjacent the upper.surfacel of the lower plate with a small space between them, a valveseat surrounding saidI opening, a ball valve freely movable in saidchamber to and from said seat, a in extending transversely7 across saidciamber above said ball lvalve vto limit movement of the latter from itsseat, a strainer wall surrounding said chamber and confinedbetween saidplates, and members independent of said chamber det-achably connectingsaid plates and located intermediate said strainer wall and saidchamber.

2. A strainer check valve, comprising, in combination, an upper and alower plate, a valve chamber extending downwardly7 from the upper plateand having a valve opening and seat at its end adjacent the lower platebut separated therefrom, said chamber, a confining bridge for the ball,a strainer screen surrounding the valve chamber, one of the plates beingformed with threaded bosses extending inward toward the opposite plate,the other of said plates being formed with bolt openings, said bossesand opening being within the space inelosed by the strainer screen, andbolts passing through the said openings and a ball valve in threadedinto the bosses and located between the valve chamber and strainerscreen.

A strainer check valve eom risin in combination, upper and lower platesof substantially elliptical form, a strainer screen of substantiallyelliptical form in horizontal section held between said upper and lowerplates, a ball valve chamber depending from the upper plate andcontained Wholly be tween the plates with aV space between the ballvalve `opening and the surface of the lower plate, a ball valve in thechamber, securing bolts extending between the elliptical plates adjacentthe end portions thereof' for securing the Vplates and strainer screenin assembled relation, said bolts passing through the space inclosed bythe strainer screen.

In testimony whereof, I have signed my naine to this specification inthe presence of two subscribing witnesses. p

WALTER F. ROPER.

Witnesses:

LUCILLA G. Roenes,

WM. O. PERKINS.

